blustealer | 6aa5ab3c4302ceaf8bdaf1937c72693909cddc56d3da6d48b4d4abe03444a61a

Analysis

max time kernel
150s
max time network
134s
platform
windows7_x64
resource
win7-20220718-en
resource tags

arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
submitted
11-08-2022 08:31

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General

Target

Pay receipt.xlsx
Size

93KB
MD5

fd13823eeaf53ea02baf46d9960f8bbf
SHA1

2b74906c8ec8c3c7d681f3129503745fce3ff7c8
SHA256

6aa5ab3c4302ceaf8bdaf1937c72693909cddc56d3da6d48b4d4abe03444a61a
SHA512

a0d6789a92b5f37168d8b39c9b509c6f5b681a8d4cb50818532e45fe4dbfc0f672e8afdd650df8d78aa16d85ca4953d81df47c57478a9b971c792438571bb5a3

Score

10^/10

blustealer remcos remotehost collection rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

mail.deiomino.icu:45547

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-93Q5F4
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2028-106-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/2028-117-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1288-105-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1288-115-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 5 IoCs

resource	yara_rule
behavioral1/memory/2028-106-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/1288-105-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1512-107-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1288-115-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2028-117-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	1608	EQNEDT32.EXE

Downloads MZ/PE file

Executes dropped EXE 8 IoCs

pid	Process
864	regasm_svch.exe
1800	regasm_svch.exe
1288	regasm_svch.exe
1028	regasm_svch.exe
2028	regasm_svch.exe
1512	regasm_svch.exe
664	dwn.exe
1644	dwn.exe

Loads dropped DLL 5 IoCs

pid	Process
1608	EQNEDT32.EXE
1608	EQNEDT32.EXE
1608	EQNEDT32.EXE
1608	EQNEDT32.EXE
1800	regasm_svch.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	regasm_svch.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 864 set thread context of 1800	864	regasm_svch.exe	32
PID 1800 set thread context of 1288	1800	regasm_svch.exe	33
PID 1800 set thread context of 2028	1800	regasm_svch.exe	36
PID 1800 set thread context of 1512	1800	regasm_svch.exe	35
PID 664 set thread context of 1644	664	dwn.exe	39

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
1608	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 31 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\COMMAND	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\ = "&Edit"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\COMMAND	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE\" /n \"%1\""	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE\" /n \"%1\""	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\ = "&Edit"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor	EXCEL.EXE

Modifies registry class 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\DefaultIcon\ = "\"%1\""	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\WinWord.exe	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shellex\IconHandler	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word\shell\edit	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\ddeexec\application\ = "Excel"	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Publisher\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b005000750062005000720069006d006100720079003e00520024006e0075006a0053005700460065003f007d0061004c00720052007000390078004000570020002500310000000000	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\ = "&Print"	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0045005800430045004c00460069006c00650073003e00560069006a00710042006f006600280059003800270077002100460049006400310067004c00510020002f0064006400650000000000	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohtmed.exe\" /p %1"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit\ = "&Edit"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\DefaultIcon\ = "\"%1\""	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\ddeexec\ = "[open(\"%1\")]"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE\" /n \"%1\""	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ddeexec\ = "[open(\"%1\")]"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\DefaultIcon	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\ShellEx	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shellex\IconHandler\ = "{42042206-2D85-11D3-8CFF-005004838597}"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word\shell\edit\ = "&Open"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Old Icon	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\ddeexec\topic	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\ = "&Edit"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher\shell\edit	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Version\14\ = "C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohtmed.exe"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0045005800430045004c00460069006c00650073003e00560069006a00710042006f006600280059003800270077002100460049006400310067004c00510020002f0064006400650000000000	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohtmed.exe\" %1"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec\application	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\ddeexec\application\ = "Excel"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\ = "&Open"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Publisher\shell\edit\ = "&Open"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ = "&Open"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher\shell\edit\ = "&Open"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\EXCEL.EXE\" /dde"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\MSPub.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\MSPUB.EXE\" %1"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\InprocServer32\ThreadingModel = "Apartment"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\command	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print\ = "&Print"	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b005000750062005000720069006d006100720079003e00520024006e0075006a0053005700460065003f007d0061004c00720052007000390078004000570020002500310000000000	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec\topic	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ddeexec\topic\ = "system"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\WinWord.exe\shell\edit\ = "&Open"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit\ = "&Open"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
944	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1288	regasm_svch.exe
1288	regasm_svch.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1800	regasm_svch.exe
1800	regasm_svch.exe
1800	regasm_svch.exe
1800	regasm_svch.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1512	regasm_svch.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
944	EXCEL.EXE
944	EXCEL.EXE
944	EXCEL.EXE
1800	regasm_svch.exe
1644	dwn.exe

Suspicious use of WriteProcessMemory 49 IoCs

description	pid	Process	procid_target
PID 1608 wrote to memory of 864	1608	EQNEDT32.EXE	30
PID 1608 wrote to memory of 864	1608	EQNEDT32.EXE	30
PID 1608 wrote to memory of 864	1608	EQNEDT32.EXE	30
PID 1608 wrote to memory of 864	1608	EQNEDT32.EXE	30
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 864 wrote to memory of 1800	864	regasm_svch.exe	32
PID 1800 wrote to memory of 1288	1800	regasm_svch.exe	33
PID 1800 wrote to memory of 1288	1800	regasm_svch.exe	33
PID 1800 wrote to memory of 1288	1800	regasm_svch.exe	33
PID 1800 wrote to memory of 1288	1800	regasm_svch.exe	33
PID 1800 wrote to memory of 1288	1800	regasm_svch.exe	33
PID 1800 wrote to memory of 2028	1800	regasm_svch.exe	36
PID 1800 wrote to memory of 2028	1800	regasm_svch.exe	36
PID 1800 wrote to memory of 2028	1800	regasm_svch.exe	36
PID 1800 wrote to memory of 2028	1800	regasm_svch.exe	36
PID 1800 wrote to memory of 2028	1800	regasm_svch.exe	36
PID 1800 wrote to memory of 1028	1800	regasm_svch.exe	34
PID 1800 wrote to memory of 1028	1800	regasm_svch.exe	34
PID 1800 wrote to memory of 1028	1800	regasm_svch.exe	34
PID 1800 wrote to memory of 1028	1800	regasm_svch.exe	34
PID 1800 wrote to memory of 1512	1800	regasm_svch.exe	35
PID 1800 wrote to memory of 1512	1800	regasm_svch.exe	35
PID 1800 wrote to memory of 1512	1800	regasm_svch.exe	35
PID 1800 wrote to memory of 1512	1800	regasm_svch.exe	35
PID 1800 wrote to memory of 1512	1800	regasm_svch.exe	35
PID 1800 wrote to memory of 664	1800	regasm_svch.exe	37
PID 1800 wrote to memory of 664	1800	regasm_svch.exe	37
PID 1800 wrote to memory of 664	1800	regasm_svch.exe	37
PID 1800 wrote to memory of 664	1800	regasm_svch.exe	37
PID 664 wrote to memory of 1644	664	dwn.exe	39
PID 664 wrote to memory of 1644	664	dwn.exe	39
PID 664 wrote to memory of 1644	664	dwn.exe	39
PID 664 wrote to memory of 1644	664	dwn.exe	39
PID 664 wrote to memory of 1644	664	dwn.exe	39
PID 664 wrote to memory of 1644	664	dwn.exe	39
PID 664 wrote to memory of 1644	664	dwn.exe	39
PID 664 wrote to memory of 1644	664	dwn.exe	39
PID 664 wrote to memory of 1644	664	dwn.exe	39

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Pay receipt.xlsx"
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:944

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1608
- C:\Users\Public\regasm_svch.exe
  "C:\Users\Public\regasm_svch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:864
- - C:\Users\Public\regasm_svch.exe
    "C:\Users\Public\regasm_svch.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1800
  - - C:\Users\Public\regasm_svch.exe
      C:\Users\Public\regasm_svch.exe /stext "C:\Users\Admin\AppData\Local\Temp\ubsmgalvetuzqaapztnrumzqkdthgt"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1288
  - - C:\Users\Public\regasm_svch.exe
      C:\Users\Public\regasm_svch.exe /stext "C:\Users\Admin\AppData\Local\Temp\pxdxz"
      4⤵
      Executes dropped EXE
      PID:1028
  - - C:\Users\Public\regasm_svch.exe
      C:\Users\Public\regasm_svch.exe /stext "C:\Users\Admin\AppData\Local\Temp\pxdxz"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:1512
  - - C:\Users\Public\regasm_svch.exe
      C:\Users\Public\regasm_svch.exe /stext "C:\Users\Admin\AppData\Local\Temp\evxeglwxsbmesgotrehtxqtztkciheawp"
      4⤵
      Executes dropped EXE
      Accesses Microsoft Outlook accounts
      PID:2028
  - - C:\Users\Admin\AppData\Roaming\dwn.exe
      "C:\Users\Admin\AppData\Roaming\dwn.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:664
    - - C:\Users\Admin\AppData\Roaming\dwn.exe
        
        "C:\Users\Admin\AppData\Roaming\dwn.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:1644

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

T1203

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\ubsmgalvetuzqaapztnrumzqkdthgt

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Roaming\dwn.exe

Filesize
1.2MB

MD5
f08c29d94dd46c548efeae606daf321b

SHA1
2f49b04ed61a9b1acbacc188c4b53052788d5a1f

SHA256
fd3b39d85a8e90fced113aa61058443535d3f4a9ae6bf96ebd5824b3eedd61ad

SHA512
95688ca70f3d2f17adcf5d6cde291169c61665e2f77df819cfc95476295e57a2edf4ebe5074e885f6c16c96114b005b61cda1ea4c2eb4ac885a219e843e0caab

Download Submit
C:\Users\Admin\AppData\Roaming\dwn.exe

Filesize
1.2MB

MD5
f08c29d94dd46c548efeae606daf321b

SHA1
2f49b04ed61a9b1acbacc188c4b53052788d5a1f

SHA256
fd3b39d85a8e90fced113aa61058443535d3f4a9ae6bf96ebd5824b3eedd61ad

SHA512
95688ca70f3d2f17adcf5d6cde291169c61665e2f77df819cfc95476295e57a2edf4ebe5074e885f6c16c96114b005b61cda1ea4c2eb4ac885a219e843e0caab

Download Submit
C:\Users\Admin\AppData\Roaming\dwn.exe

Filesize
1.2MB

MD5
f08c29d94dd46c548efeae606daf321b

SHA1
2f49b04ed61a9b1acbacc188c4b53052788d5a1f

SHA256
fd3b39d85a8e90fced113aa61058443535d3f4a9ae6bf96ebd5824b3eedd61ad

SHA512
95688ca70f3d2f17adcf5d6cde291169c61665e2f77df819cfc95476295e57a2edf4ebe5074e885f6c16c96114b005b61cda1ea4c2eb4ac885a219e843e0caab

Download Submit
C:\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
C:\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
C:\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
C:\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
C:\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
C:\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
C:\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
\Users\Admin\AppData\Roaming\dwn.exe

Filesize
1.2MB

MD5
f08c29d94dd46c548efeae606daf321b

SHA1
2f49b04ed61a9b1acbacc188c4b53052788d5a1f

SHA256
fd3b39d85a8e90fced113aa61058443535d3f4a9ae6bf96ebd5824b3eedd61ad

SHA512
95688ca70f3d2f17adcf5d6cde291169c61665e2f77df819cfc95476295e57a2edf4ebe5074e885f6c16c96114b005b61cda1ea4c2eb4ac885a219e843e0caab

Download Submit
\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
\Users\Public\regasm_svch.exe

Filesize
1.2MB

MD5
e7aec3c0721b775a5483aa1891d13f50

SHA1
2e6ec64bd9e99eaa468b769f89fe107efdb1868d

SHA256
436cf5e6015bb698449e308b6cb6071e4404eeb29bb830ad28cd1442740f5c29

SHA512
67f4ab6801eaaf47892247b72410841412f1d458d5bfc202dce595ba8c57276926f599dc1433f27827ffd6ecc82fb4bd76c791eef6934e1d827e04a7919f7b38

Download Submit
memory/664-114-0x0000000000510000-0x0000000000534000-memory.dmp

Filesize
144KB

Download
memory/664-112-0x00000000012B0000-0x00000000013EA000-memory.dmp

Filesize
1.2MB

Download
memory/664-121-0x00000000058F0000-0x00000000059C6000-memory.dmp

Filesize
856KB

Download
memory/664-122-0x0000000005190000-0x000000000522C000-memory.dmp

Filesize
624KB

Download
memory/864-72-0x0000000001F10000-0x0000000001F1C000-memory.dmp

Filesize
48KB

Download
memory/864-67-0x0000000000930000-0x0000000000A66000-memory.dmp

Filesize
1.2MB

Download
memory/864-69-0x00000000003E0000-0x0000000000404000-memory.dmp

Filesize
144KB

Download
memory/864-73-0x0000000005EF0000-0x0000000005FA8000-memory.dmp

Filesize
736KB

Download
memory/864-74-0x00000000052D0000-0x000000000534C000-memory.dmp

Filesize
496KB

Download
memory/864-71-0x0000000004C55000-0x0000000004C66000-memory.dmp

Filesize
68KB

Download
memory/864-93-0x0000000004C55000-0x0000000004C66000-memory.dmp

Filesize
68KB

Download
memory/944-55-0x0000000071181000-0x0000000071183000-memory.dmp

Filesize
8KB

Download
memory/944-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/944-54-0x000000002F1B1000-0x000000002F1B4000-memory.dmp

Filesize
12KB

Download
memory/944-57-0x000000007216D000-0x0000000072178000-memory.dmp

Filesize
44KB

Download
memory/944-120-0x000000007216D000-0x0000000072178000-memory.dmp

Filesize
44KB

Download
memory/944-119-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/944-58-0x00000000753E1000-0x00000000753E3000-memory.dmp

Filesize
8KB

Download
memory/944-70-0x000000007216D000-0x0000000072178000-memory.dmp

Filesize
44KB

Download
memory/1288-115-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1288-105-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1512-107-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1644-123-0x0000000000400000-0x0000000000495000-memory.dmp

Filesize
596KB

Download
memory/1644-124-0x0000000000400000-0x0000000000495000-memory.dmp

Filesize
596KB

Download
memory/1644-126-0x0000000000400000-0x0000000000495000-memory.dmp

Filesize
596KB

Download
memory/1644-128-0x0000000000400000-0x0000000000495000-memory.dmp

Filesize
596KB

Download
memory/1644-135-0x0000000000400000-0x0000000000495000-memory.dmp

Filesize
596KB

Download
memory/1800-94-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-80-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-75-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-81-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-118-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-82-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-76-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-83-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-92-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-87-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1800-85-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2028-106-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2028-117-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download